We examined whether the cue-locked centroparietal positivity is associated with switch-specific or general preparation processes. If this positivity (300–400 ms) indexes switch-specific preparation, faster switch trials associatedwith smaller RTswitch cost should have a larger positivity as compared to slower switch trials, but no such association should be evident for repeat trials. We extracted ERP waveforms corresponding to semi-deciles of each participant’s RT distribution (i.e., fastest to slowest 5% of trials) for switch and repeat conditions. Consistent with a switch-specific preparation process, centroparietal positivity amplitude was linked to slower RTand larger RTswitch cost for switch but not repeat trials. A later pre-target negativity (500–600 ms) was inversely correlated with RT for both switch and repeat trials, consistent with a general anticipatory preparation processes.

Item Type:	Refereed Article
Keywords:	Advance preparation, Task-switching, RT distribution, Single trial ERP
Research Division:	Psychology
Research Group:	Cognitive and computational psychology
Research Field:	Decision making
Objective Division:	Expanding Knowledge
Objective Group:	Expanding knowledge
Objective Field:	Expanding knowledge in psychology
UTAS Author:	Heathcote, A (Professor Andrew Heathcote)
ID Code:	98899
Year Published:	2011
Web of Science® Times Cited:	71
Deposited By:	Medicine
Deposited On:	2015-03-06
Last Modified:	2017-10-31
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